Acura NSX 1991 Manual page 244

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(From page 11-124)
Is there approx. 5 V?
Clutch switch signal is OK.
Table of Contents
Check the clutch switch:
1. Turn the ignition switch OFF:
2. Disconnect the 3P connector
from the clutch switch.
3. Turn the ignition switch ON (II).
4. Measure voltage between ECM
connector terminals C4 and
A26 with the clutch pedal
depressed.
Is there approx. 5 V?
Check for a short in the wire:
1. Turn the ignition switch OFF.
2. Disconnect the ECM connec-
tor C (12P) from the ECM.
3. Check for continuity between
ECM connector terminal C4
and body ground.
Is there continuity?
Substitute a known-good ECM
and recheck. If prescribed voltage
is now available, replace the orig-
inal ECM.
ECM CONNECTORS
WIRE SIDE OF FEMALE TERMINALS
Replace the clutch switch.
Repair short in the wire between
the ECM (C4) and the clutch
switch.